{"id":6873,"date":"2010-09-17T23:59:03","date_gmt":"2010-09-17T23:59:03","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=6873"},"modified":"2010-09-29T23:13:07","modified_gmt":"2010-09-29T23:13:07","slug":"interesting-pattern-of-ship-tracks-in-the-eastern-north-pacific-ocean","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/6873","title":{"rendered":"Interesting pattern of ship tracks in the eastern North Pacific Ocean"},"content":{"rendered":"
\"GOES-11<\/a>

GOES-11 0.65 \u00c2\u00b5m visible channel images<\/p><\/div>\n

McIDAS images of GOES-11 0.65 \u00c2\u00b5m visible channel data (above)<\/em><\/strong> revealed some interesting cloud features over the far eastern North Pacific Ocean on 17 September 2010<\/a><\/strong>: (1)<\/strong> a large “hole” in the stratoculumus cloud field, which contained an intersecting pattern of ship condensation trails (or “ship tracks”), and (2)<\/strong> a subtle train of von Karman vortices extending downwind of Guadeloupe Island off the coast of Baja California. These cloud features were propagating southeastward, due to northwesterly winds within the marine boundary layer.<\/p>\n

The pattern of ship tracks on the corresponding GOES-11 3.9 \u00c2\u00b5m shortwave IR images (below)<\/em><\/strong> displayed a darker<\/strong> (warmer)<\/em> signature — this was caused by the reflection of incoming solar radiation off the tops of the ship track plumes (which were composed of rather small water droplets compared to the surrounding stratocumulus clouds)<\/em> during the day when the sun angle was high. Note how this \u00e2\u20ac\u0153dark\/warm signal\u00e2\u20ac\u009d disappeared at the end of the shortwave IR image animation, when the sun angle became lower in the early evening hours.<\/p>\n

\"GOES-11<\/a>

GOES-11 3.9 \u00c2\u00b5m shortwave IR channel images<\/p><\/div>\n

A bit more detail can be seen in AWIPS images of the MODIS 0.65 \u00c2\u00b5m visible channel, the 3.7 \u00c2\u00b5m shortwave IR channel, and the 11.0 \u00c2\u00b5m IR window channel data (below)<\/em><\/strong>. Note how the ship tracks exhibited very little signal in the IR window image, since that channel is not sensitive to the reflection of solar radiation.<\/p>\n

\"MODIS<\/a>

MODIS 0.65 \u00c2\u00b5m visible, 3.7 \u00c2\u00b5m shortwave IR, and 11.0 \u00c2\u00b5m IR window images<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

McIDAS images of GOES-11 0.65 \u00c2\u00b5m visible channel data (above) revealed some interesting cloud features over the far eastern North Pacific Ocean on 17 September 2010: (1) a large “hole” in the stratoculumus cloud field, which contained an intersecting pattern of ship condensation trails (or “ship tracks”), and (2) a subtle train of von Karman […]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[18,8,12],"tags":[],"class_list":["post-6873","post","type-post","status-publish","format-standard","hentry","category-goes-11","category-marine-weather","category-modis"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/6873","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=6873"}],"version-history":[{"count":3,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/6873\/revisions"}],"predecessor-version":[{"id":6907,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/6873\/revisions\/6907"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=6873"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=6873"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=6873"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}